Forced air flow air-heating furnace



Oct? 30, 1951 A. w. RUFF FORCED AIR FLOW AIR-HEATING FURNACE lrlhnulllllll lllllll:l|llll..|l\

Filed June 25, 1949 ll. l

Patented ct. 30; 1.951

FORCED AIR FLOW AIR-'HETING FURNACE Alonzo W. Ru?, York, Pa., assignerv to Harvey- Whipple Incorporated, Springfield, Mass., a cor` poration of Massachusetts ApplicationzJune 23, 1949, Serial No..100,921V

claims. (cl. izo-*110) This invention relates to improvements in heating apparatus.

The principal object ofthe invention is the provision of heating apparatus which is not only adapted for installation in various positions but which is simple in form and compact as well as economical in operation.

According to certain novel features of the invention, the heating apparatus may be suspended v from the ceilingor the like or set on its end or sidethereby adapted for installation in various ways and in numerous locations.

According to other novel features of the invention, the heating apparatus is arranged and constructed for ready and easy accessibility to its components.

With the foregoing and various other novel features and advantages and other objects of my invention as will become more apparent as the description proceeds, the invention consists in certain novel features of construction and in the combination and arrangement of parts as will be hereinafter more particularly pointed out in the claims yhereunto annexed and more fully described and referred to in connection with the -i Fig. 4 is a partial sectional view through cover vplate 22.

Referring now to the drawings more in detail, the invention will be fully described.

A casing is provided which has front and rear walls 2 and 4, end Walls 6 and 8 and upper and lower walls I0 and I2.

Any or all of the walls -may be formed with depressions I4 and openings I6 with cover members I8 thereover as shown in Fig. 3. In Fig. 1 the rear and forward walls have covers and the end walls 6 and 8 have covers or cover plates 22 and 24. It will be understood that the cover plates may be secured to the casing in any well known manner and may be of any desired form.

A combustion chamber is provided adjacent the end wall 8 or the outlet end of the casing. Said chamber has yopposite Walls 32 and 34 which as in Fig. 1 converge to parallel walls 36. A rear wall 38 closes the rear side of the combustion `chamber 30 and the end is `extends outwardly of the' casing A plate 42` is removably secured to the side of the combustion chamberl 30 and a forward wallv 44 inclines away therefromL and connects with rear wall40,seeFig.v 2. Y .A i

It will be noted that the combustion chamber tapers rearwardly from the rforward or outletend of the casing so as to provide a narrowingl passageway forlthe products of combustion. t

`, The plate 4211s provided with an opening for an oil burner which is shown diagrammatic'ally vat'I Vin Fig. 2. This oillburner is associated withwall 4 and said plate liiand may be sinriilar to that shown in application Serial Number 76,066 of February l2, 1949 which has'been' issued as Patent No. 2,527,503, dated October 24, 195,0.

' Air for combustion enters through inlets 50, in the outer end of the oil burner and is drawn therethrough and discharged together 4withruel at the inner Aend within the combustion chamber, as will later appear. The combustion chamber mayv be provided with refractory 3i as is common practice and the burner may take various forms as may be desired.

Upper and lower hollow compartments. 5.0/ and 52 are provided at opposite sides of the combustion chamber .and have inner wallsr Il and 52 which are spaced from and follow the adjacent walls 360i said combustion chamber. L. .1

v Hollow connections BI) extend betweenadjacent walls 5D and 52 of the compartments and of the combustion chamber. A hollow connection --extends between the walls Sil and 52--'f-the compartments 50 and 52 which is disposedadjacent wall 44- of' the combustion chamber,v"see Fig. 2. Y

Bailles such as' 64 extend between upper and lower walls of compartments 50 and 52 and Afrom rear walls 66 thereofforwardly to a'point spaced from the forward ends of said compartments forming transverse passageways such as '68, see

A hollow fan housing "I0 is securedA to thecmpartments and is preferably in the form'slown in Fig'. 1. 1 A connection'l extends fromconnection 62 to the housing l0, as shown in Fig. 2". An air propeller'l4within the housing` is'c lr ried by a shaft of a motor 'I6 which isdisposed outside the casing' and is supported by (a platform An 'outlet connection 80 from the "In and has 11118 V82 connected thereto.

v In @eration air. isdrawn inwardly `thintrigh.tlile urnerfsfgr wmbusiiqa The productsof comucts of combustion and 'gasesptraverse a cir-`r cuitous route past numerous separate walls which are heated thereby so` that air'whi'ch is-` caused to flow relative to and Wipe said waifs 'is heated, as will appear.

A housing 90 is provided which hasV laninlet;v

92 and an outlet 94. This housing is mounted 1r 'air AprpellerL llt-within the housing- 9U is Said shaft 98 has a pulley y [0D fixed thereto which'is connected byanendi'gsstdifiver m2' toapuuey-loi-md en shaft,- los 'of'i'a'motorw lrwhich'isssupported onplatform 4 Y bustion chamber and compartments are wiped by the air for the efficient transfer of heat.

A minor portion of the air flows around outside th'e member I i8 and outwardly between members H4 and |22 and is effective for cooling the end portion of the casing and carrying heat from the member I I8 outwardly.

It will be noted that the"cmbustiongehamber and compartments are" spaced from the casing walls in Fig. 2, but in some cases it may be desirable to eliminate said space.

'Ijhe housing or scroll 'l0 is welded to the heat exchanger to provide a gas tight connection and i-rsuch away as` to seal the combustion gas cir- Hcuits"aridiiow'ofair.. The said scroll is in the I'path 'of air'dis'charge from the blower whereby madfremj pliable materiali'such as-canvas or thetlike; has 'one end` connected to the discharge "end-54 of -the-housing Si): Its `other 'endis `supported by `a Ymemberorv members H2 -xed to the J'ca'singpj y' Thercove'r'meinber Moat-the outlet Y'en-d ofthe casing is-'p'r'ovided with an-'outlet -l Mfwhich may `becor'mectecltoi an air distributing system of-any -desiretJt-aype.VV W f Y A Lba-ilie -HB at lthe outlet end ofthe housing vhas "an-intermediate 'portion ---I -20 extending around "azrdlspaced from the combustion chamber-and side parts v-sp'aced therefrom.- Anoutlet |-22V of ithebaiile extends -into the Youtlet H4,as shown.

As stated, the apparatusfmaybe. installed by Jsuspendir'ig it from-a ceiling crit may be -set on -its end. A- covercplate orportion. thereof-.fat the rearor endofithe casing isrremoved or. other meansiis provided for admitting circulating. air for the. blower.. Suitable vcircuit control means -forsthe motors 16 and |08 isprovided foropera- ,tion of thewapparatlis so that the desired opera- -Irionis obtained. -MeanSiQr. Vadmitting airA into thesearendf theasiriaacording t9, the., vform A QL theA invention.. shown. includes i, a. nl1ra1ity. of eopeniagslin plate 21.35. Shown in Eig., 4, Y. Y

With the fan Vin operation, and with fuel -sup- .eleailie bigger. aegisnoameaps `in sipw' 31,103.1 ,the prqgucts Q,f =9mhlis.t9i1-ar drwn by e a' propeller 14 fromY th'combustion cham- V p `os`te directibhs' itoand "tli''ugfthe compartments '5U' and '52fandfiito `tle 'hs'ig 10. Th' ht"gass'ar forcefroi'iijtheli'siiig outwardly through connection 85 into the l'flie 82 which'may be connected tothestack. I The circuitous" movement of ho't gases' heats the'iumercus Afts'zall's of the combustion "chamber andfcompartments for Yheating air 'delivered by Y'th'elb'lov'ven I j" A y I Y discharged fromV the `blower jows through 72xconnection *I I-ll` past 'the walls Vof 'the' compartments 5G and 52 and combustion chamber andbe- '7 v`sichtype andthe-other ofl snearftyp'e "soithat-rev gardless of the positioning of th'eapparatus vibration's'fandresulting noise`v is eliminated; 1 D

The hub fof the suction fan 4is-i provided wlth an insulatingbushin'gt'o-ret'ardlheat transfer tothe 'said-shaftarfd motor.` Y

The controls for the-blower and lfan-motors may-@be arranged for any 'idesired cycle fof operation thereof Operation Jof -the Ablower motorvm'ay be 4delayedrelative to ltheA 'operation Vofthe lfan. They may operate simultaneously, the blowenmay be operated while fthe Jian` .is 'i2noperative'.all to the A=encl that the apparatus maybe operated tofsuit various conditions-'and requi'reirren-ts.M The invention fmay be :embodied in yothery Ispecific forms without departing from -the essential characteristics thereof. Hence,V the :pi'fese'nt f embodiments 'are therefore to be considered Sinall respects merely as 'bei-rig illustrative vand not fa's being restrictive, the scope-'fof the inventionebeing indicated fbythe fa'ppendedl claimsratherthan by the foregoing-'des'cifiptiolfx,4 a'n'd allinodications and variations las'rfallwl'ihin the-meaning and liurview nrall'geof' equivalency of the etillpe'nde'd claims-airethereforeiintended to beeinbraced therein. -Y

What it isfiesirec'lltlelfaiin' l VLetters Pat'eiitftheUnitedStates z.Y I 'f l. Heating apparatus comprising in 'combina- Y itlio'r-ii-fa *casing v'h'fai/"ir'ig *an butltiatanoutlet end thereof, a combustion chamber disposed-in -lsaidl'lutlet-end iof the ica havingfa reai` -portion tapering inwardly l 'ca'si'r'ig away'from aiii ft-let,- Lh'c'n'isli'ng'si^`acljaceiit*and AAspaceclf/om opposite sides of the rear portion of sadbombus- `tien#ch-'amber connections between the rear A'portiony of?sii-itil"h'nbis'tic'rii chamb'randfhousings; ja st'icticn device' LHav-ing "afdis'charge, connections lbetweehsaiid housings -aiidsution device whereby products of combustion are dra-wn f-romsaid-f'combustiorehan'iber through said housings-and--disfreir-r -said '-d-isehlarge. ls'aid lvcasing 'provided with air `inletfmeansffor@ alcillnlreie,v aridlia blower 'device fearwardl'y'/ lef saidf combustion chamber and sings fo'r 'prOj-eting air -ffwardlypas't and-between saidcombustionfchamber and housingsran outwardlyof-saidoutlet;

f2. Heating apparatus comprising `incombina tion, l"a =c`asing having 1an -tinlet 'end' "and :an outlet f nd'said' o'tltferdlllividd 'With-'afnai-'rl otitlet j allel end portions providing a chamber which 'narrows from its forward end rearwardly, separate housings spaced from opposite'sides of said combustion chamber having inner walls substantially parallel to said end portions and converging walls `of the combustion chamber, hollow l connections 'between said housings and end wall portions of Athe combustion chamber and a hollow connection betweensaid housings, a suction device within said casing having a suction inlet connected to said last named connection and 'providedwith a discharge extending through said casing', said inlet end of the casing provided with an air inlet dis'- vposed rearwardly of said combustion chamber and separate housings for the now of air vtherepast from said inlet to said air outlet.

3. Heating apparatus comprising in. combination, a casing having an outlet end 'provided ywith an air outlet for connection to 1an .air system, a combustion chamber for an oil burner in the outlet end of said casing having rearwardly converging opposite walls extending inwardly of the casing away from said outlet Iand terminating in substantially parallel end portions providing a 'chamber which narrows from its forward end rearwardly, separate housings spaced from opposite sides of said combustion chamber having in- `ner walls substantially parallel to said end portions and converging walls of the combustion chamber, hollow connections between said housings and end wall portions of the combustion chamber and a hollow connection between said housings, a suction device within said casing having a suction inlet connected to said last :named connection and provided with a discharge z extending through said casing, said casing provid- -ed with air inlet means for a blower; and a blow- Aer within said casing rearwardly of said-chamber and housings having an inlet and provided fwith a discharge for directing air towards and past said chamber and housings and therebetween and out the outlet of the casing.-

4. Heating apparatus comprising in combination, a casing having an outlet end provided with an air outlet for connection to an air system,acom

Jbustion chamber for anioil burner in the outlet Iend of said casing having rearwardly converging vsaid last named connection and-provided with a discharge extending through said casing, said .casing provided with air inlet means for a blower, ,fand a blower within said casing rearwardly of said chamber and housings having an inlet and provided with a .discharge for directing" air towards andl past said chamber and housings and therebetween and out the outlet of the casing and'operating means therefor' outside said casing, operating means for said suction device and for said blower, and operative connections between said operating means and said suction device and blower.

5. Heating apparatus comprising in combination, a casing having an outlet end provided with jan air'outlet for connectior'i to an air systeiifa combustion chamber for an oil burner in the outlet end of said casing having rearwardly converging opposite walls extending inwardly of the casing away from said outlet and terminating in 4substantially parallel end portions providing a chamber which narrows from its forward end rearwardly, separate housings spaced from opposite-sides of said combustion chamber having inner walls substantially parallel to said end portions and converging walls -of the combustion 'chamber, hollow connections between said housings and end wall portions of the combustion chamber and a hollow connection between said housings, a suction device within said casing having a suction inlet connected to said last named connection and provided with a discharge ex- -tending through said casing, said casing provided with air inlet means for a blower, a blower within said casing rearwardly of said chamber and housings having an inlet and provided with a discharge for directing air towards and past said chamber and housings and therebetween and out the outlet of the casing and operating means `therefor outside said casing, and operative connections between said operating means and said suction device and blower, a 'baiile in the outlet end of the casing extending around and spaced from-the end of the combustion chamber and adjacent rearwardly extending walls thereof and from adjacent walls of the casing having an outlet of relatively less dimensions than those of saidair outlet whereby air from said blower is. directed around said combustion chamber to said.

outlet and in relatively less amount around said baiile and out said outlet,

6. Unitary heating apparatus comprising in combination, a casing having upper and lower and side and opposite end walls, one of said end walls provided with an air outlet of certain area, a Combustion chamber within the casing having an end wall spaced inwardly and rearwardly from said air outlet and curving upwardly and away from said outlet merging in upper and lower walls s which converge rearwardly and terminate in elongated upper and lower rearwardly extending and spaced upper and lower walls, vertical side walls secured to said end and upper and lower walls and an end wall secured to said side and upper and lower walls, closed housings within said casing above and below the upper and lower walls of said chamber having elongated outer and inner and side and end walls, said inner walls of `said housings being spaced from and substantial- 1y parallel to the upper and lower parallel and converging walls oi the combustion chamber, hol- -low connections extending between the inner rwalls of said housings and upper and lower walls of said combustion chamber, outer and side walls of said housing being spaced from adjacent walls of the casing, a hollow connection extending between inner walls of said housings, said casing provided with an air inlet means for a blower, an air blower in said casing adjacent the other end wall thereof having a discharge outlet for directing air to said air outlet past and between said housings and combustion chamber and casing -walls, a suction device within said casing having a suction inlet and a discharge extending through a side wall of said casing, a hollow connection connecting said suction inlet and said last-named hollow connections, separate driving means for said blower and suction device disposed outside said casing, and driving connections between said drivinemeansandnseid llolower,.-ar1 c1 suction means extendinsthroushsaidfcasins. c q g.

7, Unitary heating apparatus. comprising -L in combination, a casing .having upperand lower and sideg and oppositefend walls, one of said end walls provided with an air outlet of certain are a,a combustion chamber Within the casing having yan endwall spaced inwardly and` rearwardly from said air loutlet and, curving upwardly, and away from Said outlet merging in upper and` lower Walls 1inner and side and end walls, said; inner walls of Vsaidjhousings being spaced from andsubstantially parallel to the upper and lowel` parallel and .converging Walls of the combustion chamber, ,hollow connections kextending between the inner Vwalls of Ysaid housings and upper and lower wallspf said combustion chamber, vouter and side walls of said c housing being spaced from-adjacent walls-of the casngLa hollow connection extending between inner walls of said housings, said casing provided with air inlet means for a blower, an air blower in said 4casing adjacent the other end kwall therel of, having a discharge outlet for'. directing air to said air outlet past vand Vbetween `said Lhousings and combustion chamber and casing walls,

a suction device within said casing having a suction inlet and a discharge extending through a side wall of said casing, a hollowconnection connecting said suction inlet and said last-named hollow connections, separate driving means for said blower and suction-device disposed outside said casing, andrdriving connections between ysaid driving means and said blower and suction means extending through lsaid casing, and a -baille disposed between and spaced from said one wall Vof the casing and curved end wall of the combustion chamber having an air outlet of relatively'less area than the air outlet of the casing and extend'4 ing thereunto.

8. Heating apparatus comprising in combination, a casing having an air outlet, a combustion chamber disposed inthe air outlet end of said icasing and having a rear portion taperinginvwardly of the casing away from theoutletyhousgings adjacent to and spaced from'opposite sides '0f-the rear port-ion of said-'combustion chamber,

vconnections between the rear portion of said comi, *bustion chamber and housings, a suction device having a discharge, connections between said housings and suction 'device wherebyfproducts `o-f combustion are drawn from -said `combustion chamber through said housings and discharged fromgthe discharge, said casing provided with air inlet-@means for a blower, and a vblower-device 'rearwardly of said combustion chamber-and housings for projecting airiforwardly :past :and

between said Ycombustion chamber vand housings and outwardly of the air outlet.`

9, Heating apparatus comprising in 1 combina,-

,said C tionfafcasipghevinsan inleacnd and, an. outlet mdh-sed'putlet end provided Witiran air; outlet Afor;. conne@tion toren-air System.v a combustion a Vsuction device within said casing having a Suctioninlet. connectedto .seid last named connection vand provided with a, discharge extending .through said casinasaid inlet end of the casing provided with an airinlet disposed rearwardly 0f said combustionchamber. and separate housings for the low of air therepast from said inlet tosaid air outlet. Y

10.A Oil burnerfapparatus comprising in cor-nbination, a casing having an outlet and provided with .an airoutlet for connection to an air system, la combustion chamber Vfor the Oil burner in the outlet end of said casinghaving rearwardly converging opposite .Walls extending inwardly'fof said casing away from the outlet and terminating in .substantially parallel end portions providingza chamber which narrows, fromcits forward end rearwardly, separate housings spaced from opposite sides of said combustion chamber having innerwalls substemtiallyy parallel to the end .pertions ,and converging walls of said combustion chamber, hollowconnections between said housings andend wall portions of said combustion `c-lf-iamber andA a hollow connection between said housings, a suction device within said casing having a suction inlet connected yto said last named connection and provided with a discharge extending through said casing, saidcasing provvided with air outlet means for a blower, anda between and out l'the outlet of said casing.

ALONZO W. RUFF.

REFERENCES CITED The :following references are of record in the file of this patent:

A UNITED sTATEs ,PATENTS Number Name Date 1,826,148 i Delamere Oct. `13, 193,1 .2,015,195 Sadwi't-h Sept. 24,1935 2,160,269 Jorolemon May'30,'l939 2,241,026 Wylie May 6, 19.41 2,250,139 Shimer July 22, 1941 Y 2,300,578 Lane Nov. 3, ,1942 2,302,859 Hare Nov. 24, 1942 Schneider Dec. 14, '1.948 

